/Engine/Source/Runtime/PakFile/Public/IPlatformFilePak.h
Returns the RelativePathFromMount Filename for every file found in the given Iostore Container
static void GetFilenamesFromIostoreContainer ( const [FString](API\Runtime\Core\Containers\FString) & InContainerName, [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & OutFileList )